Specifications
Manufacturer: STMicroelectronics
Device Type: Serial SPI bus EEPROM nonvolatile memory chip, supplied in tape and reel packaging for automated surface mounting production
Electrical Specifications
Total memory capacity: 40 Kbit, organized as 5120 × 8-bit bytes
Operating supply voltage scope: 2.5 V to 5.5 V
Highest SPI communication clock rate: 10 MHz
Page write length: 16 bytes
Maximum time consumed for single page programming: 5 ms
Each memory cell supports up to 4 million erasing and writing cycles
Data can be retained steadily for no less than 200 years under regular room temperature conditions
Operating temperature range: -40°C to +85°C
Package format: 8-pin narrow SOIC surface mount plastic package
Main Functional Features
It adopts standard SPI serial transmission protocol, which can be easily matched with most general-purpose microcontrollers
A dedicated hardware write protection pin is reserved. Users can lock the upper half storage area or the whole chip to avoid accidental erasure and modification of stored data
Multiple chips of the same model can be mounted on one SPI bus simultaneously through chip selection configuration
Internal power-on reset and undervoltage lockout circuits are integrated to avoid wrong write operations caused by power supply voltage jitter during startup and power fluctuation
Built-in electrostatic discharge protection circuits greatly enhance the anti-interference ability of the chip in industrial and consumer electronic environments
Extremely low standby quiescent current is designed inside the chip, which is very suitable for battery-powered portable devices
Reading and writing performance keeps stable within the whole working temperature interval
Packaging materials do not contain halogen substances and fully comply with RoHS environmental specifications
Typical Application Scenarios
Parameter configuration storage for industrial small control equipment
User setting and running log saving of household electronic appliances
Calibration data backup of handheld measuring instruments
Configuration information storage of wireless IoT sensor nodes
Embedded peripheral equipment fixed parameter recording
Small intelligent electronic product user preference data preservation
